webdynpro coding

[Former Member]

Hi,

I am stuck in the following code:

// Check if date is valid

if (!DateCalculator.isValid(usrDate))

Description of the Error is The method isValid(Date) is undefined for the type StartView.

Please reply.

[Former Member · Accepted solution]

Hi Prithish,

isValid method defined for the DataCaculator , Can you please chekc that ?

Regards

Pankaj Prasoon

[Former Member · Accepted solution]

Actually i am trying to validate teh date field & i am not sure about DateCalculator.

How i can validate the date field?

[Former Member · Accepted solution]

Implement you own method isValidDate with this code instead of the DateCalculator class:

public boolean isValidDate(String date)
{
   // set date format, this can be changed to whatever format
   // you want, MM-dd-yyyy, MM.dd.yyyy, dd.MM.yyyy etc.
  
   SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy");
   
   Date testDate = null;

   // we will now try to parse the string into date form
   try
   {
     testDate = sdf.parse(date);
   }
  catch (ParseException e)
   {
     errorMessage = "the date you provided is in an invalid date" +
                             " format.";
     return false;
   }



   if (!sdf.format(testDate).equals(date))
   {
     errorMessage = "The date that you provided is invalid.";
     return false;
   }
   
   // if we make it to here without getting an error it is assumed that
   // the date was a valid one and that it's in the proper format

   return true;

} 

Regards,

Martin

[Former Member · Accepted solution]

Hi Pritish,

I am sorry but if you can tel what validation are you looking for. You can use the following code if ur checking for the date formt.

public boolean isValidDate(String date)

{

// set date format, this can be changed to whatever format

// you want, MM-dd-yyyy, MM.dd.yyyy, dd.MM.yyyy etc.

SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy");

// declare and initialize testDate variable, this is what will hold

// our converted string

Date testDate = null;

// we will now try to parse the string into date form

try

{

testDate = sdf.parse(date);

}

// if the format of the string provided doesn't match the format we

// declared in SimpleDateFormat() we will get an exception

catch (ParseException e)

{

errorMessage = "the date you provided is in an invalid date" +

" format.";

return false;

}

// dateformat.parse will accept any date as long as it's in the format

// you defined, it simply rolls dates over, for example, december 32

// becomes jan 1 and december 0 becomes november 30

// This statement will make sure that once the string

// has been checked for proper formatting that the date is still the

// date that was entered, if it's not, we assume that the date is invalid

if (!sdf.format(testDate).equals(date))

{

errorMessage = "The date that you provided is invalid.";

return false;

}

// if we make it to here without getting an error it is assumed that

// the date was a valid one and that it's in the proper format

return true;

} // end isValidDate

Regards

Pankaj Prasoon

[vmadhuvarshi_ · Accepted solution]

Prithwish,

If you are using an input field to enter date value, you do not need to define any validation routine. Binding a Context attribute of type date to your inputfield is all that it takes. If you are trying to validate a Date field received from ABAP side, you may validate it with code below that I found [here|http://www.dreamincode.net/forums/showtopic14886.htm].

// date validation using SimpleDateFormat
// it will take a string and make sure it's in the proper
// format as defined by you, and it will also make sure that
// it's a legal date

public boolean isValidDate(String date)
{
   // set date format, this can be changed to whatever format
   // you want, MM-dd-yyyy, MM.dd.yyyy, dd.MM.yyyy etc.
   // you can read more about it here:
   // http://java.sun.com/j2se/1.4.2/docs/api/index.html
   
   SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy");
   
   // declare and initialize testDate variable, this is what will hold
   // our converted string
   
   Date testDate = null;

   // we will now try to parse the string into date form
   try
   {
     testDate = sdf.parse(date);
   }

   // if the format of the string provided doesn't match the format we
   // declared in SimpleDateFormat() we will get an exception

   catch (ParseException e)
   {
     errorMessage = "the date you provided is in an invalid date" +
                             " format.";
     return false;
   }

   // dateformat.parse will accept any date as long as it's in the format
   // you defined, it simply rolls dates over, for example, december 32
   // becomes jan 1 and december 0 becomes november 30
   // This statement will make sure that once the string
   // has been checked for proper formatting that the date is still the
   // date that was entered, if it's not, we assume that the date is invalid

   if (!sdf.format(testDate).equals(date))
   {
     errorMessage = "The date that you provided is invalid.";
     return false;
   }
   
   // if we make it to here without getting an error it is assumed that
   // the date was a valid one and that it's in the proper format

   return true;

} // end isValidDate

Hope it helps.

Vishwas.